52 lines
1 KiB
Markdown
52 lines
1 KiB
Markdown
# Work in progress cranelift codegen backend for rust
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> ⚠⚠⚠ This doesn't do anything useful yet ⚠⚠⚠
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## Building
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```bash
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$ git clone https://github.com/bjorn3/rustc_codegen_cranelift.git
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$ cd rustc_codegen_cranelift
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$ rustup override set nightly
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$ git submodule update --init
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$ cargo build
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```
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## Usage
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```bash
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$ rustc -Zcodegen-backend=$(pwd)/target/debug/librustc_codegen_cranelift.so my_crate.rs --crate-type lib -Og
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```
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## Building libcore
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```bash
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$ rustup component add rust-src
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$ ./prepare_libcore.sh
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$ ./build.sh
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```
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> This should stop with `error: aborting due to <...> previous errors`
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>
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> Please submit a bug if not
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## Not yet supported
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* Checked binops
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* Statics
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* Drop glue
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* Building libraries
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* Other call abi's
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* Unsized types
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* Slice indexing
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* Sub slice
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* Some rvalue's
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* Inline assembly
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* Custom sections
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## Known errors
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* cranelift-module api seems to be used wrong, thus causing panic for some consts
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* cranelift-codegen doesn't have encodings for some instructions for types smaller than I32
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